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Cushion|Natural|GIA

1.51ct I SI1 Cushion Natural Diamond

VG • I/SI1 • GIA 1235579975

Certificate GIA 1235579975

Diamond specifications and retailer prices

From £4,956 GBP
$6,640 USD
As of November 2, 2026
Save £4,351 GBP (47%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: £9,307 GBP at MOH London · As of November 1, 2026
View at MOH London

About this 1.51ct natural cushion diamond

This 1.51ct natural cushion sits in the one-and-a-half to two carat band, graded I colour (near-colourless) and SI1 clarity (slightly-included), with a very-good cut grade stated by the retailer rather than the lab and certified by GIA 1235579975. Listed at 21 retailers as of November 1, 2026, with prices from £4,956 to £9,307, a £4,351 spread on the same certified stone. MOH London lists it at £9,307. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.51
Carat
I
Colour
SI1
Clarity
Very Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Very Good
PolishVery Good
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 1235579975
Dimensions6.68 × 6.64 × 4.43 mm
L/W Ratio1.01
Top View
6.68 mm6.64 mm1.51 ctI / SI1
OriginNatural
CutVery Good
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateGIA 1235579975
Side View
Table 70.0%CrownGirdle: STK-THKPavilionCulet: NoneDepth 66.7%

Caratlytics Score

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B
Good
Decent quality, room for better deals
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 2
Current: £9,307 GBP|Low: £4,654 GBP|High: £9,419 GBP|Avg: £6,517 GBP|-0.1%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 2, 2026
Retailer 9£4,956 GBP
Retailer 7£4,985 GBP
Retailer 5£5,585 GBP
Retailer 8£5,585 GBP
Retailer 3£6,227 GBP
Retailer 6£6,333 GBP
Retailer 2£6,917 GBP
Retailer 4£8,204 GBP
MOH London£9,307 GBP

44 data points across 9 retailers

21 retailers£4,956 GBP to £9,307 GBP

B
Cheapest Retailer
-
£4,956 GBP
$6,640 USD
Retailer 2
-
£4,985 GBP
$6,680 USD
View
Price last confirmed 14 days ago
B
Retailer 3
-
£5,187 GBP
$6,950 USD
View
B
Retailer 4
-
£5,229 GBP
$7,006 USD
View
B
Retailer 5
-
£5,367 GBP
$7,192 USD
View
B
Retailer 6
-
£5,522 GBP
CA$10,276 CAD
View
B
Retailer 7
-
£5,571 GBP
$7,465 USD
View
B
Retailer 8
-
£5,585 GBP
$7,483 USD
View
Final sale: no returns
B
Retailer 9
-
£5,585 GBP
$7,483 USD
View
B
Retailer 10
-
£5,683 GBP
$7,614 USD
View
B
Retailer 11
-
£6,227 GBP
View
B
Retailer 12
-
£6,243 GBP
$8,365 USD
View
Retailer 13
-
£6,333 GBP
A$13,054 AUD
View
Price last confirmed 9 days ago
B
Retailer 14
-
£6,406 GBP
$8,583 USD
View
B
Retailer 15
-
£6,650 GBP
$8,910 USD
View
B
Retailer 16
-
£6,650 GBP
$8,910 USD
View
B
Retailer 17
-
£6,874 GBP
$9,210 USD
View
B
Retailer 18
-
£6,917 GBP
€8,827 EUR
View
Retailer 19
-
£7,354 GBP
$9,853 USD
View
Price last confirmed 10 days ago
B
Retailer 20
-
£8,204 GBP
ZAR 177,588 ZAR
View
Most Expensive
B
MOH London
B8380E7D5 · Nov 1
£9,307 GBP
View
20 more retailers have this diamond
Prices start from £4,956 GBPSave up to £4,351 GBP

Carat Hunter is not affiliated with, endorsed by, or sponsored by any retailer listed. Retailer information is from publicly available sources and may not be current. Verify details directly with the retailer before purchasing. Return terms as we hold them. Check the retailer's own returns page before you buy.

B
1.51ct Cushion
£4,956 GBP